DNA and RNA Bases. In DNA, there are four different bases: adenine (A) and guanine (G) are the larger purines. Cytosine (C) and thymine (T) are the smaller pyrimidines.
Gretna is the second-largest city and parish seat of Jefferson Parish, Louisiana, United States. Gretna is on the west bank of the Mississippi River, just east and across the river from uptown New Orleans. It is part of the New Orleans â Metairie â Kenner Metropolitan Statistical Area. The population was 17,736 at the 2010 census.
Varna is a village in Marshall County, Illinois, United States. The population was 436 at the 2000 census. It is part of the Peoria, Illinois Metropolitan Statistical Area. Included in the Postal Zone of Varna is the nearby community of Lake Wildwood. Varna is located at 41Â°2â²12â³N 89Â°13â²29â³W / 41.03667Â°N 89.22472Â°W / 41.03667; -89.22472 (41.036562, -89.224779).